8513968717 has 2 divisors, whose sum is σ = 8513968718. Its totient is φ = 8513968716.

The previous prime is 8513968699. The next prime is 8513968753. The reversal of 8513968717 is 7178693158.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7504063876 + 1009904841 = 86626^2 + 31779^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8513968717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8513968517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256984358 + 4256984359.

It is an arithmetic number, because the mean of its divisors is an integer number (4256984359).

Almost surely, 2^8513968717 is an apocalyptic number.

It is an amenable number.

8513968717 is a deficient number, since it is larger than the sum of its proper divisors (1).

8513968717 is an equidigital number, since it uses as much as digits as its factorization.

8513968717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 55.

The square root of 8513968717 is about 92271.1694788789. The cubic root of 8513968717 is about 2041.9448897983.

The spelling of 8513968717 in words is "eight billion, five hundred thirteen million, nine hundred sixty-eight thousand, seven hundred seventeen".